水平太差 特来求助 [docker-compose LNMP 数据库连不上]

做个临时站点 从未学过 docker 听说很方便 于是看了几篇网上教程 复制粘贴后稍作修改 目前情况是：docker-compose 能运行， 各容器能运行，网站能打开 phpinfo，phpmyadmin 能连接上 mariadb 。但是安装 wordpress 时，已经用 phpmyadmin 建了数据库和用户授权。但安装页面填好数据库用户名等信息提交后，提示“There has been a critical error on this website.” 哪位能指点下 可能是哪里出问题了？下面是配置文件 不知道有没有写错的地方？

[目录结构]

| html | index.php | mariadb | conf.d | db | logs | nginx | conf.d | domain |fullchain.cer & domain.key | default.conf | logs | nginx.conf | php | logs | Dockerfile | docker-compose.yml 

[ Dockerfile ]

FROM php:7.4-fpm-alpine Run apt install iputils-ping \ && docker-php-ext-install mysqli && docker-php-ext-enable mysqli && docker-php-ext-install pdo pdo_mysql 

[ docker-compose.yml ]

version: '3' networks: lnmp-net: driver: bridge services: mariadb: container_name: mariadb image: mariadb:10.4 ports: - 3306:3306 environment: MYSQL_ROOT_PASSWORD: xxxxxx volumes: - /lnmp/mariadb/db:/var/lib/mysql - /lnmp/mariadb/conf.d:/etc/my.cnf.d - /lnmp/mariadb/logs:/var/log/mariadb restart: always networks: - lnmp-net nginx: container_name: nginx image: nginx:latest ports: - 80:80 - 443:443 volumes: - /lnmp/html:/usr/share/nginx/html - /lnmp/nginx/nginx.conf:/etc/nginx/nginx.conf - /lnmp/nginx/conf.d:/etc/nginx/conf.d - /lnmp/nginx/logs:/var/log/nginx depends_on: - mariadb - php restart: always networks: - lnmp-net php: container_name: php build: ./php image: php:7.4-fpm-alpine ports: - 9000:9000 volumes: - /lnmp/html:/var/www/html - /lnmp/php/php.ini:/usr/local/etc/php/php.ini - /lnmp/php/logs:/usr/local/var/log restart: always networks: - lnmp-net phpmyadmin: container_name: phpmyadmin image: phpmyadmin/phpmyadmin ports: - 2000:80 restart: always environment: PMA_HOST: mariadb networks: - lnmp-net 

[/lnmp/nginx/conf.d/default.conf ]

...... root /usr/share/nginx/html; index index.html index.htm index.php; error_page 500 502 503 504 /50x.html; location = /50x.html { root /usr/share/nginx/html; } location ~ \.php$ { fastcgi_pass php:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/html/$fastcgi_script_name; include fastcgi_params; } location ~ /\.ht { deny all; } }